Why Password Strength Matters
Passwords are the primary line of defence for most online accounts. When a password is weak, attackers can gain access to your email, banking, social media, and other accounts — often without you realising it until significant damage has been done.
Attackers use several methods to crack passwords. One common method is a brute force attack, where automated software systematically tries every possible combination of characters until it finds the right one. Another is a dictionary attack, where software tries common words, phrases, and known passwords from previous data breaches. Both methods are fast, automated, and increasingly powerful.
The Single Biggest Factor: Length
The most important factor in password strength is length. Every character you add to a password multiplies the number of possible combinations an attacker must try.
A six-character password using only lowercase letters has fewer than 309 million possible combinations — which sounds like a lot, but modern computers can test billions of combinations per second. A six-character password can be cracked almost instantly.
A twelve-character password using a mix of uppercase letters, lowercase letters, numbers, and symbols has an astronomically larger number of possible combinations — enough to make a brute force attack impractical even with powerful hardware. Most security experts currently recommend a minimum length of 12 to 16 characters for important accounts.
Character Variety Multiplies Strength
Using a wider range of character types — uppercase letters, lowercase letters, numbers, and special symbols — increases the number of possible combinations for any given password length. A password that uses only lowercase letters has 26 possible characters at each position. A password that uses all four character types has around 95 possible characters at each position. This difference compounds significantly over the length of the password.
What Makes a Password Weak
Common passwords and predictable patterns are among the weakest choices. Passwords like "password", "123456", or "qwerty" appear in virtually every attacker's dictionary list and are tried first. Any word found in a standard dictionary is also vulnerable, even with simple substitutions like replacing letters with numbers.
Personal information is another significant weakness. Passwords containing your name, birthday, or pet's name are far easier to guess than random combinations. Reusing the same password across multiple accounts is also a serious risk. When one service suffers a data breach and your password is exposed, attackers routinely try the same credentials on other popular services — a technique known as credential stuffing.
Passphrases as an Alternative
One approach that balances security and memorability is the passphrase — a sequence of several random, unrelated words strung together. A passphrase of four or five genuinely random words can be more secure than a shorter but more complex random string, while being easier to remember. The key is that the words must be truly random and unrelated, not a meaningful phrase or song lyric.
Using a Password Manager
The challenge with strong passwords is remembering them, especially if you use a different one for every account. A password manager solves this problem by generating and storing strong, unique passwords for every site you use. You only need to remember one strong master password. Password managers are widely recommended by security professionals and are available for all major devices and browsers.
Two-Factor Authentication
Even a strong password can be compromised if it is exposed in a data breach. Two-factor authentication adds a second layer of protection by requiring a second form of verification — such as a code sent to your phone — in addition to your password. Enabling two-factor authentication on important accounts significantly reduces the risk of unauthorised access even if your password becomes known.
Generate a Strong Password Now
You can create a strong, random password instantly using the free tool on this site. Choose your preferred length and character types to generate a password that meets current security standards.
This article is for general informational purposes only. For security advice specific to your organisation, please consult a qualified cybersecurity professional.
